2018 Ram ProMaster Window Van Gas Tank Size & Fuel Capacity
Fuel tank capacity
24.0gal · 91 L
The 2018 Ram ProMaster Window Van has a fuel tank capacity of 24.0 gallons (91 liters) on every trim.
24.0 gal · Bigger than 85% of 2018 models we list.
2018 Ram ProMaster Window Van fuel tank capacity by trim
| Trim | Engine | Drive | Tank | |||
|---|---|---|---|---|---|---|
| 2500 High Roof 3dr Van 3.6L 6cyl 6A · FWD | 3.6L 6cyl 6A | FWD | 24.0 gal91 L | |||
| 3500 High Roof 3dr Ext Van 3.6L 6cyl 6A · FWD | 3.6L 6cyl 6A | FWD | 24.0 gal91 L | |||
| No trim matches all of these filters. | ||||||
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. The EPA doesn't rate fuel economy for heavy-duty pickups and vans (over 8,500 lb gross vehicle weight), so these trims have no official MPG or range.
What it costs to fill up a 2018 Ram ProMaster Window Van
$102.48 to fill the 24.0-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 24.0 gal | Regular | $4.27 | $102.48 | $76.86 |
By region, 24.0-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $96.48 |
| Midwest | $4.27 | $102.48 |
| Gulf CoastLowest | $3.70 | $88.80 |
| Rocky Mountain | $4.46 | $107.04 |
| West Coast | $5.42 | $130.08 |
| CaliforniaHighest | $5.89 | $141.36 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 24.0-gallon tank$102.48
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
ProMaster Window Van tank size in other years
The 2018 ProMaster Window Van uses the same 24.0 gal tank as every ProMaster Window Van since 2014.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2023 ProMaster Window Van | 24.0 gal | Not rated |
| 2022 ProMaster Window Van | 24.0 gal | Not rated |
| 2021 ProMaster Window Van | 24.0 gal | Not rated |
| 2020 ProMaster Window Van | 24.0 gal | Not rated |
| 2019 ProMaster Window Van | 24.0 gal | Not rated |
| 2018 ProMaster Window Van | 24.0 gal | Not rated |
| 2017 ProMaster Window Van | 24.0 gal | Not rated |
| 2016 ProMaster Window Van | 24.0 gal | Not rated |
| 2015 ProMaster Window Van | 24.0 gal | Not rated |
| 2014 ProMaster Window Van | 24.0 gal | Not rated |
2018 Ram ProMaster Window Van vs similar 2018 vans
The ProMaster Window Van has the smallest tank of the three 2018 vans compared here: 24.0 gallons, against 31.0 for the Chevrolet Express Cargo.
| 2018 model | Tank | Longest highway range |
|---|---|---|
| Chevrolet Express Cargo | 31.0 gal | Not rated |
| GMC Savana Cargo | 31.0 gal | Not rated |
| Ram ProMaster Window Van | 24.0 gal | Not rated |
Other 2018 vans of a similar size, one model per brand.
Frequently asked questions
What is the fuel tank capacity of the 2018 Ram ProMaster Window Van?
The 2018 Ram ProMaster Window Van holds 24.0 gallons (91 liters) on every trim we list.
How many gallons and liters does the 2018 Ram ProMaster Window Van gas tank hold?
The 2018 Ram ProMaster Window Van tank holds 91 liters, or 24.0 gallons in US gallons.
What gas does the 2018 Ram ProMaster Window Van take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2018 Ram ProMaster Window Van?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 24.0-gallon tank from empty costs $102.48. It ranges from $88.80 in the Gulf Coast to $141.36 in California.
How much does a full tank of gas weigh in a 2018 Ram ProMaster Window Van?
About 149 pounds for the 24.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Ram ProMaster Window Van have a bigger gas tank than the Chevrolet Express Cargo?
No. The 2018 Chevrolet Express Cargo holds up to 31.0 gallons; the 2018 Ram ProMaster Window Van holds up to 24.0.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
- MPG and range: EPA ratings. Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.